Combined broom pressing and nailing machine



Aug. M, 1923. Q 1,465,162

a. w. DUVALL COMBINED BROOM PRESSING AND NAILING MACHINE Filed June 27.1921 TENT Ff' l tild.

GEORGE W. DUVALL, OE DAVENPORT, IOWA, ASSIGNOR TO UNITED STATES BROOLICOMPANY, OF DAVENPORT, IOWA, A CORPORATION OF IO'SJVA.

COMBINED BROOM PRESSING AND NAILING MACHINE.

Application filed June 27, 1921. Serial No. 486,715.

TaaZZ whom it may concern:

Be it known that I, GEORGE W. DUvALL, a

resident of Davenport, in the county of Scott 7 and State of Iowa, and acitizen of the United States, have invented certain new and usefulImprovements in Combined Broom Pressing and Nailing Machines, of whichthe following is a specification.

My invention is a combined broom press ing and nailing machine. I

This invention embodies the idea of combining in one machine thepressing and nalling together, of metal case brooms and the like.

Heretofore this work hasbeen performed in separate operations andlargely by hand.

WVith the method now generally employed for making metal case brooms thena1ls are driven through the band one at a t1me by hand. The broom isthen placed 1n a machine and pressed. It is quite plain that nails thusdriven by hand are likely to tip over in pressing and further it isimpossible to hold the broom tightly together when made in this manner.

One of the dominant features of my present invention resides in drivingthe nails into the broom while it is under its maximum compression, thenails being clinched at that so moment prevent any relaxation after thebroom is nailed which differs from the hand nailing method where onenail at a time is driven and it requires many blows of-the hammer on asingle nail; in other words my present invention includes the driving ofa plurality of nails at a single stroke whlle the broom is underpressure.

In the accompanying drawings; Fig. 1 is a View in perspective of theessential elements of the device required to perform the work asoutlined above. V v

Fig. 2 shows the main elements of a metal case broom assembled'ready topress and nail together in the machine.

Fig. 3 shows the finished broom.

A quantity of broom corn shown by number 1 is inserted within the band2. This thin metal band #2 is approximately circular in form. It is thebutt or stalk end of the corn which is inserted within theband. Thehandle 3 is then placed in the center of the broom corn at the stalkendof same, and the broom is ready for pressing and nailing. It shouldbe understood that the assembling 55' of the broom elements abovedescribed is done within the machine as shown in the dotted lines inFig. l.

After the broom has been assembled within the press as shown theoperator then presses the foot treadle 4: which throws the machine intooperation thus pressing the broom into the form shown in Fig. 3, andnailing the same together while under pressure.

The numeral 5 is the main frame within which is the vertically slidinghead 6. A roller 7 is rotatably mounted on a shaft, which shaft issecured in the projection of the head 6 at its lower side.

The roller 7 rests on the cam 8. This cam is secured to a shaftrotatably held within hearing A and B of frame 5. Secured to one end ofthis camshaft is the master gear 9. The gear 9 meshes with the gear 10.rear 10 is rotatably mounted on the shaft 11. It will be seen that gear11 is provided with one part of a dental coupling. The other half of thedental coupling 12 is mounted on the shaft 11 and while it rotates inunison with the shaft, is free to move longitudinally on the same. Adisk 13 is attached to shaft 11. Mounted around shaft 11 and betweendisk 13 and coupling 12 there is the compres sion coil spring 14:. Thisspring serves to push the two dental coupling members together exceptwhen they are forcibly held apart.

The rods15 and 16 are pivoted to bar 17 at their lower ends. This bar 17is secured to frame 5. Pins are secured to each of the upper ends of therods 15 and 16. The pins extend into the groove in dental couplingmember 12. Mounted between the rods 15 and 16 is a roller 28 free torotate on its shaft 18. The gear 9 is provided with a projection 19which holds the roller away from the gear, and by means of rods 15 and16 holds the members of the dental coupling apart. The lower end ofshaft 18 is provided with an arm 20. This arm is connected to the crank21 by the rod 22. Crank 21 is attached to the shaft 23. This shaftextends to the opposite side of the machine and has attached to it thetreadle 4L.

Belt pulley 2 1 and pinion 25 are mounted on and revolve in unison withshaft 26. Pinion 25 meshes with gear 27. Gear 27 is attached to shaft11. Assuming motion to be imparted to belt wheel 2 then all gears runcontinuously except gears 9 and 10. To cause these to revolve theoperator presses down on treadle 4. This action through the mechanicalmeans shown draws the roller 28 off the narrow projection 19 thusallowing the spring 1 to force the dental coupling members together. Theoperator having removed his foot from the treadle 4E the spring 29pushes the shaft 18 and the roller 28 to its original position. Thedental cou pling having been locked together the gear nine will make onerevolution and at the last of the revolution the projection 19 willforce the coupling apart thus bringing 10 and 9 to a state of rest untilthe operation is repeated. During the revolution mentioned the cam 8revolves forcing the roller '7 and the heads 6 upward thus compressingthe broom. The form of cam 8 is such as to'hol d the compressed broomunder pressure long enough for the nailing device to perform its workwhile driving the nails through the band 2 as shown in Fig. 3.

Mounted on the frame 5 are the brackets 30 and 31. These brackets serveas guides to retain in a vertically slidable position the punchhead 32.This head is operatively connected by the eccentric rod 33 and 34 withthe eccentrics and 36. Attached to the head 32 are any desired number ofpunches 37. These punches move vertically and in unison with the head32. Their function is to descend on the tops or heads and drive or pressthem through the band into the broom corn. The nails are conveyed fromthe nail hopper 3S and delivered under the punches by the tubes 39. Vhatis known as the pick-off of any well-known design isemployed adjacent tothe hopper to insure only one. nail at a time being delivered below theplunger-s.

The eccentrics 35 and 36 are secured on shaft 40. This shaft revolves inbearings C and D. The chain-wheel 41 is rotatably mounted on shaft 40.Wheel 4-1 by means of the chain-belt 4L2 revolves continuously and inunison with shaft 26. The eccentrics 35 and 36 are caused to make onerevolution and then rest by any of the well-known knock-out devices, nowon the market. Such a device is shown by the numbers 43, 44, and 1-5. Inorder to trip the knock-out and the nailing attachment in motion whilethe broom is under compression the trip rod 46 is attached to head 6. Ashead 6 nears the limit of its upward travel the rod 4E6 comes in contactwith the knockout device and sets the same in motion.

With this invention the broom is tightly pressed and the nails aredriven while the broom is under pressure which insures that they gostraight throughth'e broom. By using nails of the right length thepoints will come in contact with the lower portion of the band and turnand clinch tightly onthe broom corn or other fibre. The broom is thenturned over and the operation of pressing and driving another set ofnails is repeated.

I claim 1. In a broom pressing and nailing machine, the combination witha frame, of a continuously rotating shaft, gearing driven continuallythereby, a compression or sliding head, a cam for actuating said head,means for imparting a single rotation to said cam from said continuouslyrotating gearing for compressing a broom, said means including a shaftupon which the cam is mounted, a gear on said shaft, a dental couplingintermittently meshed for driving said gear from said continuouslydriven gearing, a yoke, controlling the meshing and engaging one half ofsaid coupling, a roller carried by the yoke and normally pressingagainst said gear and arranged to permit meshing of the coupling androtation of the gear and cam, a stop on the gear for err gaging theroller and moving it laterally and actuating the yoke to unmesh the coupling, means actuating by the operator for moving the roller from itsengagement with the stop and permitting the meshing of the coupling andthe rotation of the cam one revolution, and means for nailing broomwhile under compression. 7

2. In a broom pressing and nailing machine, the combination with aframe, of a continuously rotating shaft, gearing driven continuallythereby, a compression or sliding head, a cam for actuating said head,means for imparting a single rotation to said cam from said continuouslyrotating gearing for compressing a broom, said means including a shaftupon which the cam is mounted, a gear on said shaft, and a dentalcoupling in termittently meshed for driving said gear from saidcontinuously driven gearing, a yoke controlling the meshing and engagingone half of said coupling, a roller carried by the yoke and normallypressing against said gear-and arranged to permit meshing of thecoupling and rotation of the gear and cam, a stop on the gear forengaging the roller and moving it laterally and actuating the yoke tounmesh the coupling, and means actuated by the operator for moving therollerfrom its engagement with the stopand permitting the meshing of thecoupling and the rotation of the cam for one revolution.

3. In a broom pressing and nailing ma-' cally actuated by thecompressing movement of said sliding head.

4. In a broom pressing and nailing machine, the combination With aframe, of a continuously rotating shaft, gearing driven continuallythereby, a compression or sliding head, a cam for actuating said head,means for imparting a single rotation to said cam from said continuouslyrotating gearing for compressing a broom, and intermittent means drivenby said continuously rotating gearing fordriving nails in a broom Whileunder compression from said sliding head, said means including a shaft,eccentrics on the shaft, and plungers actuated by said eccentrics, andmeans automatically operated upon the compressing movement of the headfor actuating said last-mentioned shaft and eccentrics. o

5. In a broom pressing and nailing machine, the combination with aframe, of a continuously rotating shaft, gearing driven continuallythereby, a compression or slid ing head, a cam for actuating said head,means for imparting a single rotation to said cam from said continuouslyrotating gearing for compressing a broom, intermittent means driven bysaid continuously rotating gearing for driving nails in a broom Whileunder compression from said sliding head, said means including a shaft,eccentrics on the shaft, and plungers actuated by said eccentrics, andmeans imparting rotary movement to said eccentrics, said nail drivingmechanism automatically controlled by the movement of said sliding headso that the nailing is done while the broom is under compression.

6. In a broom pressing and nailing machine, the combination With aframe, of a continuously rotating shaft, gearing driven continuallythereby, a compression or sliding head, a cam for actuating said head,means for imparting a single rotation to said cam from said continuouslyrotating gearing for compressing a broom, intermittent means driven bysaid continuously rotating gearing for driving nails in a broom Whileunder compression from said sliding head, said means including a shaft,eccentrics on the shaft, plungers actuated by said eccentrics, and meansfor intermittently imparting rotary movement to said eccentrics,controlled automatically by the compressing movement of said head, saidmeans including a finger on the sliding head, a bell crank lever on theframe, and a knock-out clutch on the shaft carrying the eccentrics.

In testimony whereof I hereunto affix my signature.

GEORGE W. DUVALL.

